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Ultimate Guide to Sound Absorption

Ultimate Guide to Mechanical System Noise & Vibrations

Ultimate Guide to Room Acoustics

• EMC
  • The Basics of EMC: Electromagnetic Compatibility
    • Elements of the Electromagnetic Environment
    • Electromagnetic Wave Transmission
    • Electromagnetic Radiation Absorption
    • Electrical communications
    • Electric charge
    • Electrical noise generator
    • Electric filter
    • Electric susceptibility
  • Methods of Electromagnetic Compatibility (EMC), EMI and RF Engineering
    • The Ten Most-Important EMC Problems/Issues and How to Correct Them
      1. Ground Impedance, Open Slots, and Poor Shielding
      2. Bad Cable Grounding and Improving Electrical Connector Immunity
      3. Switching Devices Generating Emissions
      4. Emissions for LCD monitor displays
      5. Stray Internal Coupling Paths and Data lines running under crystal oscillator
      6. (coming soon)
      7. Crosstalk and Ground Planes
      8. Poor Signal Returns
      9. Non-continuous Return Paths
      10. ESD (electrostatic discharge) in Metal Enclosures and Failure Mode
    • EMC Precompliance testing, problem-solving and troubleshooting
      • Important Problems that Need Attention
      • Create an EMC Maintenance and Troubleshooting Kit
      • Easy-to-Perform Precompliance Testing & Troubleshooting
      • Commonly-found EMI Diagnostic Equipment and Test-bench: Probes
      • A Current Probe used to Measure a Cable's Common-Mode Currents
      • Ferrite Chokes Block Common-Mode Currents and AC Line Cord Emissions
      • Testing a Bare PCB (printed circuit board) for Radiated Emissions and Analyzing Crystal Oscillators
      • Analyzing Polar Plots with an Oscilloscope
      • Measuring and Plotting Resonances with a Loop Probe
      • Signal Return and Shield Conduction Tests
      • ESD (electrostatic discharge) tests
      • Managing EMC -- a summary
  • The Basics of Electrical Interference
    • The Nature of Electromagnetic Interference
  • Protecting Signals from EMI
    • Introduction and Capacitive Coupling
    • Corruption of Signals due to Inductive Coupling
    • Ground Loops
    • Grounding to Reduce EMI
    • Shielding
    • Twisted Pair Cables and Wiring
    • A Do-It-Yourself Low-Cost EMI Filter
  • The Basics of Electrical Grounding
  • The Basics of Electrical Noise
  • The Basics of Electrical Shielding
  • Architectural Electromagnetic Shielding
  • Electromagnetic Pulse (EMP)
  • EMC Testing: What to Look For in a Service
  • EMC Consultants: What to Look For in a Service
  • EMC Testing: Tools and Devices
  • Zapping Electrical Noise: A Practical Example for Home Audio/Video Applications
    
• Environmental Testing
  • Environmental Test Equipment
    • Clean Rooms
      • Components of a Clean Room
      • Components of a Clean Room: part 2
    • Environmental Test Chambers
      • Interface and Output Options
      • Temperature Range
        • Low End
        • High End
      • Humidity range
      • Temperature Change Rate
      • Product Inside and Chamber Durability
      • Chamber Construction
      • Air-Cooled vs. Water-Cooled
      • Start-Up and Preventive Maintenance
• Vibration Testing and Vibration Analysis
  • Fundamentals of Vibration Physics
    • What is Harmonic Motion?
    • Harmonic Oscillators
    • What is Vibration?
    • What is Mechanical Vibration
    • Vibration Damping
    • Vibration Isolation
    • Vibration Machine
    • Vibration Pickup
    • Acoustic emission
    • Acoustic holography
    • Acoustic impedance
    • Acoustic interferometer
    • Acoustic microscope
    • Acoustic noise
    • Acoustic radiation pressure
    • Acoustic resonator
    • Acoustic signal processing
    • Acoustics
  • Vibration Sensors
  • Vibration Testing: The Basics
  • Force-Measuring Methods
  • Modal Testing
  • Vibration and Acoustical Testing/Engineering Services
  • Shock and Vibration Testing: Shakers and other Equipment
    • Electrodynamic Shaker
    • Shaker Controllers
    • Shock Test Systems and Shock Testers
    • Drop Testing
  • Vibration Analysis: Predictive and Preventive Mechanical Maintenance Through Vibration Measurement
    • Vibration Analyzer for Industrial Machinery: What to Look for When Choosing a Model
• Electronic Test Instruments
  
  
  
  • Introduction
  
  
  
  • Measurement Theory: Electrical Quantities • Resistance • Polarity • Direct Current • Power • Alternating Current • Non-sinusoidal Waveforms • Harmonics • Combined DC and AC • Modulated Signals • Digital Signals • Decibels • Measurement Error • The Loading Effect • Instrument Inputs • Bandwidth
  
  
  
  • Voltmeters, Ammeters, and Ohmmeters: Analog and Digital Meters • DC Voltmeters • AC Voltmeters • Ammeters • Ohmmeters • Multimeters
  
  
  
  • Signal Sources: Circuit Model • Imperfections in Signal Sources • Sine Wave Sources • Function Generators • Pulse Generators • Signal Generators • Sweep Generators • Arbitrary Waveform Generators • Synthesized Sources
  
  
  
  • Oscilloscopes : The Oscilloscope Concept • Time-Base Operation • Triggering • Sweep Control • Vertical Amplifier • X-Y Display Mode • Oscilloscope Inputs • Scopesmanship • Digital Oscilloscopes • Oscilloscope Probes
  
  
  
  • Oscilloscope Measurements: Sine Wave Measurements • Voltage Gain Measurement • Phase Measurement • Lissajous Method • Pulse Measurement • Digital Signals • Frequency-Response Measurement • Square Wave Testing • Linearity Measurement • Curve Tracer Measurement Technique
  
  
  
  • Miscellaneous Electronic Instruments: Frequency Counters • Receiver Comparison Method • Logic Probes • Power Supplies
  
  
  
  • Circuits for Electronic Measurements : Resistance Measurement--Indirect Method • Bridge Measurements • RL and RC Circuits • LC Resonant Circuits • Diode Measurement Circuit • Instrument Connections • Attenuators • Power Splitters and Combiners • Measurement Filters
  
  
  
  • Frequency Domain Instruments: Spectrum Analyzers • Bank-of-Filters Spectrum Analyzers • FFT Spectrum Analyzers • Wavemeters • Narrowband vs. Broadband Measurements • Swept Spectrum Analyzers • Gain/Phase Meters • Network Analyzers • Distortion Analyzers



• The Basics of Electrical Measurements



• Measurement of Noise: Basic Sound Measurement Technique -- Weighting Networks – Microphones – Microphone Calibration • Using Sound-Level Meters-Measuring Indoor Noise •  Reverberant Field - Semi-reverberant Field • Background Noise



• Vibration Measurement and Monitoring: Vibration Measurement • Vibration Monitoring • Basic Vibration Monitoring System • Continuous or Periodic Measurements?
  
  
• Using an Oscilloscope
  
  
• Glossary
  
  
• Links and Resources for Environmental Testing, EMC Testing, Vibration Testing
  
  
• Books on Environmental Testing, EMC Testing, Vibration Testing
  
  
• Acoustics 101 -- Understanding the Nature of Sound, Acoustics and Noise Control
  

Architectural Acoustics

• Section 6:

  • Ancient Theaters
  • Directivity Contours for Speech
  • Audience Seating
  • Sight Line Basics
  • Sight Line Layouts
  • Checklist for Lecture Rooms
  • Reflection, Diffusion, and Diffraction
  • Wavelength and Frequency for Sound in Air
  • Pattern of Reflected Sound
  • Ray Diagrams
  • Ray-Diagram Graphics
  • Sound Paths in Auditoriums
  • Ceilings
  • Echoes
  • Echo Control Principles
  • Rear-Wall Echo Control Treatment
  • Side Walls
  • Patterns of Reverberant Decay
  • Articulation Index
  • Flutter Echo
  • Small Rooms
  • Concave Surfaces
  • Sound Reflectors
  • Checklist for Worship Spaces
  • Air Absorption
  • Checklist for Multipurpose Auditoriums
  • How to Compute Cubic Volume
  • Example Problem (Volume Computation)
  • Example Problem (Reverberation Times)
  • Optimum Reverberation Time
  • Variable Sound Absorbers
  • Variable Volume Examples
  • Basic Theater Stages
  • Stage Enclosures for Orchestra
  • Forestage Canopies
  • Orchestra Pits
  • Balconies
  • Balcony Design Examples
  • Evaluation Guide for Music Performance Spaces
  • Evaluation Guide
  • Evaluation Guide (Example Application)
  • Music Conditions Affected by Room Acoustics Design
  • Sabine and the Concert Hall
  • Checklist for Concert Halls
  • Case Study 1: Woodruff Center, Emory University
  • Case Study 2: Boettcher Concert Hall
  • Case Study 3: Dunham Auditorium, Brevard College
  • Case Study 4: Studio B, Todd-AO Films
  • Checklist for Room Acoustics Design

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